I agree, that's not neon tetra disease. It's something recently seen which is becoming more common, the best anyone has been able to come up with is that it's a viral infection which affects neon tetras. I don't know if the white lumps have ever been examined by a virologist to confirm this.
Neon tetra disease symptoms include the colours becoming washed out, cysts appearing within the body tissue, and eventually a curved spine. The fish's behaviour is also said to change.
Agree for the fullest. Probably an (Irido)viral issue. It is quite species specific, not that lethal, not that contagious, etc...
"Funniest" thing is that NTD only ever comes up in case of neons. NTD only is called that way cause it is diagnosed for the first time on a neon. But there is hardly ever someone asking if it is NTD in case of other fish.
A lot of neons have False NTD though, a species specific strain of Columnaris bacteria, pretty hard to treat but possible.
The lumbs : Probably untreatable
NTD : untreatable, very rare, lethal to all fish, highly contagious.
False NTD : treatable, species specific, quite common in Neons..
For the lumbs and false NTD : Clean water, low stresslevels, wnough space, etc ... will do good.